Boiler-furnace



(No Medal.)

B. L. MOORE. BOILER FURNACE.

No. 425,236. Patented Apr. 8, 1890.

Witnesses: I I t Inventor I Attorney UNITED STATES PATENT OF ICE,

ENOS L. MOORE, OF PORTSMOUTH, OHIO.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 425,236, dated April 8, 1890.

Application filed June 15, 1889- Serial No. 314,504. (No model.)

To all whom it may concern.-

Be it known that I, ENOS L. MOORE, of Portsmouth, Sciot-o county, Ohio, have invented certain new and useful Improvements in Boiler- Furnaces, of which the following is a specification. I

This invention pertains to improvements in the construction of boiler-furnaces designed to improve the combustion and enhance the economy of fuel and consume the smoke.

My improvements will be readily understood from the following description, taken in connection with the accompanying drawings, in which- Figure 1 is a vertical longitudinal section of a boiler-furnace exemplifying my improvements, an internally-fired boiler of the locomotive type being chosen for exemplification 5 and Fig. 2,a horizontal section of the same in the planes of lines a and b of Fig. 1.

In the drawings, A indicates the boiler, shown as being of the ordinary locomotive type; B, the furnace thereof; 0, the usual grate forming the floor of the furnace; D, the vertical walls of the furnace, formed in the exemplification by water-spaces, the interior walls of the furnace in this case serving also as heating-surface for the boiler, as is usual in internally-fired boilers; E, the firing-door through one of the walls of the furnace; F, a fuel-chamber within the furnace, the same being rectangular in plan and consisting of three vertical walls, one of the furnace-walls forming one of the four walls of this fuelchamber, the fuel-chamber being roofed over and being open at its base, which is located a short distance above the grate; G, a skeleton of pipe arranged in connection with the walls of the fuel-chamber, this pipe serving as a binding and support for the walls of the fuelchamber and being in connection with the water-spaces of the boiler, so that the pipe will furnish heatingsurface and be protected against burning; and H, suspenders reaching from the roof of the furnace to the roof of the fuel-chamber, and serving as the means by which the fuel-chamber is suspended within the furnace.

The walls and roof of the fuel-chamber are to be formed of refractory material or of metal, provided with water-spaces to absorb the excessive heat In the exemplification I show the pipe-work skeleton as a preferred construction, this skeleton being suspended from the roof of the furnace, and in turn supporting fire-clay slabs which form the walls of the fuel-chamber; The firing-door is to be in that wall of the furnace which forms one of the walls of the fuel-chamber. ater is to circulate through the pipe of the skeleton, so as .to prevent the pipe from being burned. By connecting the pipe with the water and steam spaces of the boiler the proper circula tion and cooling are secured and additional heating-surface to the boiler is also secured.

In using this furnace the fuel is put in at the firing-door, as is usual, and as much as desired may be put into the fuel-chamber, which may be even filled as full as it is possible to fill it from the firing-door. Under no circumstances must the amount of fuel in the fuel-chamber be so little as to show live fire at the top of the fuel in the fuel-chamber. The fuel thus placed in the fuel-chamber settles down onto the grate and spreads onto the grate, covering the entire areaof the grate.

Air of combustion is drawn up through the grate by the action of the draft, and intense combustion of the fuel takes place on the grate exterior to the fuelchamber. Combustion also takes place on the grate immediately under the fuel-chamber; but such combustion is incomplete and results simply in the coking of the fuel and in the production of carbonic oxide, which carbonic oxide becomes rapidly drawn, under the influence of the draft, through the incandescent fuel on the grate exterior to the fuel-chamber, where it receives additional oxygen drawn directly up through the grate, and consequently goes into combastion.

The results of the use of this furnace are the practically-perfect combustion of the fuel, a smokeless fire, and a marked economy of fuel.

It has been proposed to apply a fuel-chamber within a furnace, the grate extending under the fuel-chamber only, and the walls of the f uel-chamber extending down to the grate, the entire combustion of the fuel taking place in the fuel-chamber, Whose walls were to be perforated for the outflow'of the resulting gases, and which was to be supplied with injected steam. I disclaim such construction as of my invention. It has been proposed to form a grated chamber within a fire-box, the walls of the chamber being perforated and the fire-box exterior to the chamber being without the grate, all of the solid fuel being burned within the chamber; and it has also been proposed to extend a mid-feather from the door-wall of the fire-box inwardly and downwardly to near the grate. I disclaim both these constructions as of my invention.

I claim as my invention- 1. In aboiler-furnace, the combination, substantially as set forth, of the vertical Walls of the furnace, a fire-grate at the base of and comprehending the entire area of the furnace, vertical walls disposed inwardly away from the furnace-walls and extending from a distance above the grate upward toward the roof of the furnace, a horizontal roof covering the chamber formed by said inner walls, and a fuel-door leading to said inner chamber.

2. In a boiler-furnace, the combination, substantially as set forth, of the vertical walls of the furnace, a fire-grate at the base and comprehending the entire area of the furnace, a

roofed rectangular fuel-chamber disposed within the furnace, with its walls parallel to- 

